Re: Help Identify this SCSI card.

[supertimer@aol.com (Supertimer)]

bobryan9@my-deja.com wrote:

>1986 Apple Computer Inc. Apple SCSI card
>8904
>820-0193-a
>fcc id bcg6dsa2b2087
>607-0291-B
>
>It has 8 jumpers, 1 has the jumper block on it.  I think it is for SCSI
>ID.
>
>Is this just a SCSI, or HS SCSI?  (high speed)  What Revision is it?  If
>it is just SCSI, can I upgrade to HS by ROM replacement?  Can I get any
>performance increase by upgrading the ROM or other chips?  With my Zip
>disk that  I formatted with my RAMFAST, I can only see the first
>partition on the drive from the GS finder.  Do I need a driver file?
>This SCSI card seems very slow to my old RAMFast.

It is a revision C Apple SCSI card.  Pretty terrible performance.
Install the Apple SCSI drivers (SCSI.HD and SCSI Manager) from
the System 6.0.1 disks and it will see all your partitions and
increase performance a little.  However, the Apple High Speed
SCSI card runs much faster.

You can't upgrade the ROM.  The High Speed SCSI card is a
totally different design.  When Apple released it, they showed
it off with a demo of a full screen star wars clip that loaded
each frame directly off the hard drive, 32k per frame, 30 frames
per second, 960k/sec transfer.  This was hot stuff in the late
1980s!  Most people thought the High Speed SCSI card was
what the revision C SCSI card should have been.